Boar, Giant - Although not as common as their lesser cousins, giant boar are known to inhabit the warmer areas of Toutus, including the Howling Forest (near the Godsblood Straits).
Brownie - These fey creatures related to sprites and pixies have been touched by the powers of Law. Although very shy and wary of bigger folk, brownies are nonetheless useful allies against Chaos. They have been known to ally with powerful lawful mages as familiars, and also found in both the Shorgan Forest and the Talloak forest.
Couatl - These agents of Law, when not on the Planes of Law, are found in warmer, tropical climates and rarely in Toutus.
Demons, all - All these demons could be found in the Planes of Chaos, and could travel to the Material Plane either through a Chaos Portal or individual summoning
Dragon, Silver - Silver dragons are as rare as gold dragons and, like them, can disguise themselves to blend in with lesser races. Silver dragons are known to be friendly with lawful clerics and deities but, unlike lammasu and shedu, are not in servitude or owe any great loyalty. Tales of silver-bearded dwarves transforming into silver dragons have occasionally been heard both in the Grulven Mountains and the Ten Peaks.
Ghast - These stinking undead are primarily found in Narvellis, in the Varreshiss Islands, but apparently some clerics of Storshin have discovered a ritual to transform normal ghouls into ghasts and are travelling from one region to another looking for ghouls to transform.
Ghoul, Lacedon - These undead are found in the waters around the Varreshiss Islands, particularly the cursed and haunted Narvellis Island with its undead masters.
Golem, Flesh, Stone & Iron - These constructs are among the most powerful that a magic user can create. The students of Gerontium in Maquosmouth would be most impressed if they found out how to create these.
Irish Elk - These huge majestic herbivores are found in northern climates, including the hills and plains of the Walrus Freehold, and on some of the Varreshiss Islands.
Ki-Rin - These heavenly creatures are very rarely seen except on the Planes of Law. When they do appear on the Material Plane, it is to oversee the fight against some terrible evil foe. Ignore the psionics and give them 1 clerical spell from each level from 1st to 7th
Koalinth (aquatic hobgoblin) - These creatures are believed to have come through the Chaos Portal created in the sunken city of Urdus, and now have set up bases around the Godsblood Straits. They often clash with their main rivals, the Sahuagin.
Lamia - These chaotic deceivers are found in ruined, desolate areas including the Twisted Hills and the Godsblood Hills. They are also found on the Planes of Chaos, and most of the lamias on the Material Plane came through the Chaos Portals.
Lammasu - These noble creatures of Law will sometimes be sent by Lawful deities to assist or advise their mortal followers. They are also found on the Planes of Law.
Leucrotta - These strange predators are definitely chaotic in nature, and are found near some chaos portals, including Maquosmouth and Aerisport in the Godsblood Straits.
Lurker Above - These strange ambushers dwell underground. They have evolved in the Underworld, but have adapted and thrived in deliberately created dungeons.
Morkoth - These strange underwater predators are not common, but can be found in deep waters, including off the western coast of Toutus such as around the Vareshiss Isles and Godsblood Straits. Sages believe, based on survivors accounts, that these are not natural creatures but evil monsters of Chaos.
Ogre Mage - Rather than being a separate species, on Kaelaross, Ogre mages are ogre leaders who have made a dark pact with a powerful chaos god (usually Bhael) and been transformed. They may either be on their own or else among a band of normal ogres either as leader or as lieutenant to an ogre chief.
Peryton - Bizarre stag-headed predators. They could only be a creation of Chaos, and their vicious behaviour confirms this. A few have been sighted around the Chaos Portal in Aerisport, while others are seen in the Twisted Hills south of the Walrus Freehold
Quasit - These demonic imps are often found in areas where other demons are found. Also they may ally themselves to a particularly chaotic and unpleasant magic user.
Rakshasa - Originating in Pelepton's home plane of Aegothis, these tiger-faced shapeshifters have slipped through chaos portals and have now infiltrated surviving cities around Kaelaross such as Ironmarket and Trislem.
Remorhaz - These giant polar worms are found on the icecap north of the Walrus Freehold. They are not natural creatures but are thought to have come through a portal from Noreesis Vale (change alignment from neutral to chaotic).
Roper - Sages believe that although these creatures may have started off as natural creatures in the Underworld, they have been touched by Chaos and are found in some planes of Chaos as well as dungeons and the underworld.
Sahuagin - These violent sea raiders are the bane of both other sea creatures and shore-dwelling land folk. They are thought to have originated in the Planes of Chaos, but several outposts have been established around the chaos portal in Urdus where they clash with both the Koalinths and the mermen in the area.
Satyr - these wild and unpredictable fey are notorious for their appetites for wine, music, dancing and women. They are found in small groups in the largest forests, including the Shorgan Forest, the Talloak Forest and even the Twilight Forest.
Shedu - Along with Ki-Rin, Couatls and Lammasus, these are the messengers and agents of the Lawful gods sent to assist and advise their mortal followers in their battle against the forces of Chaos. Ignore the psionics and give them spellcasting as if 7th level magic users.
Slithering Tracker - These amorphous predators may be related to less intelligent slimes and oozes. They are found in both dark dungeons and also the sprawling caverns of the Underworld.
Toad, Ice - These creatures are found in the far north, on the ice floes and icecap north of the Walrus Channel. They only come onto human lands during the bitterest winter, though there are records of a band of ice toads causing trouble among trappers and hunters north of Walrus City a few years back.
Umber Hulk - These huge monsters are creatures of chaos, placed in the Underworld by dark powers (such as Havok) to cause as much disruption and death to miners and explorers as possible.
Water Weird - These malevolent creatures are found in the Elemental Plane of Water, but have been tainted by Chaos, giving them an evil urge to kill. They rarely occur in bodies of water such as seas, rivers, lakes, underground pools or even village wells.
Winter Wolf - These chaotic predators originated from the Chaos Plane known as Noreesis Vale, but have slipped through a chaos portal and now roam the northernmost reaches of Kaelaross, including the Icemud Tundra and Twilight Forest as well as the island of Cortacus in the Walrus Freehold.
Xorn - These creatures from the Elemental Plane of Earth don't often occur on the Material Plane, but when they do it is either at the beckoning of a powerful spellcaster or else deep in the Underworld.
Others, which I have not had time to comment on, include:
Beetle, Giant Rhinoceros
Lizard, Giant Fire
Lizard, Giant Minotaur
Naga, Spirit & Guardian